Abstract
In the near future, heat pumps will start to flood the heating market. More generally, a market of systems usable for both heating and cooling is beginning to impose itself. This can be achieved by vapor-compression cycles, absorption cycles or others. The detailed models presented here can be applied to heat pumps or cooling systems. This report on ``heat pump modeling`` should be very open regarding the diversity of systems and components. As for now, it gathers component models usable to build a vapor compression cycle. - as long as it does not cause major modeling problems or numerical troubles, the real behavior of the refrigerant was approached by the mean of the Martin and Hou equation of state; only pure (single component) refrigerants are examined. Nevertheless, the REFPROP database (N.I.S.T.) can be used. Moreover it gives the ability of choosing refrigerant mixtures as working fluid. - hermetic compressor; heat transfer between components inside the shell are taken into account; pressure losses along the fluid path; polytropic and non adiabatic compression. - capillary tube as expansion device; homogeneous model considering the thermal non-equilibrium between the superheated liquid and the saturated vapor within the two-phase flow part; the sound speed has
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Citation Formats
Ranval, W, Rongere, F X, and Winkelmann, F.
Heat pump modeling.
France: N. p.,
1992.
Web.
Ranval, W, Rongere, F X, & Winkelmann, F.
Heat pump modeling.
France.
Ranval, W, Rongere, F X, and Winkelmann, F.
1992.
"Heat pump modeling."
France.
@misc{etde_10143132,
title = {Heat pump modeling}
author = {Ranval, W, Rongere, F X, and Winkelmann, F}
abstractNote = {In the near future, heat pumps will start to flood the heating market. More generally, a market of systems usable for both heating and cooling is beginning to impose itself. This can be achieved by vapor-compression cycles, absorption cycles or others. The detailed models presented here can be applied to heat pumps or cooling systems. This report on ``heat pump modeling`` should be very open regarding the diversity of systems and components. As for now, it gathers component models usable to build a vapor compression cycle. - as long as it does not cause major modeling problems or numerical troubles, the real behavior of the refrigerant was approached by the mean of the Martin and Hou equation of state; only pure (single component) refrigerants are examined. Nevertheless, the REFPROP database (N.I.S.T.) can be used. Moreover it gives the ability of choosing refrigerant mixtures as working fluid. - hermetic compressor; heat transfer between components inside the shell are taken into account; pressure losses along the fluid path; polytropic and non adiabatic compression. - capillary tube as expansion device; homogeneous model considering the thermal non-equilibrium between the superheated liquid and the saturated vapor within the two-phase flow part; the sound speed has been chosen as the critical flow criterion. - heat exchanger model also usable for evaporators and condensers; a discretization of the exchanger is needed; the number of elements can be dramatically reduced as soon as the locations of flow changes are approximately known; temperature evolution can be linear or logarithmic. Validation work has to be performed for each of the components before running simulations for heat pump cycles. These components were partly implemented in SPARK, Simulation Program Analysis Research Kernel, a simulation environment developed at Lawrence Berkeley Laboratory. They will also be part of the model library of CLIM2000. (author).}
place = {France}
year = {1992}
month = {Dec}
}
title = {Heat pump modeling}
author = {Ranval, W, Rongere, F X, and Winkelmann, F}
abstractNote = {In the near future, heat pumps will start to flood the heating market. More generally, a market of systems usable for both heating and cooling is beginning to impose itself. This can be achieved by vapor-compression cycles, absorption cycles or others. The detailed models presented here can be applied to heat pumps or cooling systems. This report on ``heat pump modeling`` should be very open regarding the diversity of systems and components. As for now, it gathers component models usable to build a vapor compression cycle. - as long as it does not cause major modeling problems or numerical troubles, the real behavior of the refrigerant was approached by the mean of the Martin and Hou equation of state; only pure (single component) refrigerants are examined. Nevertheless, the REFPROP database (N.I.S.T.) can be used. Moreover it gives the ability of choosing refrigerant mixtures as working fluid. - hermetic compressor; heat transfer between components inside the shell are taken into account; pressure losses along the fluid path; polytropic and non adiabatic compression. - capillary tube as expansion device; homogeneous model considering the thermal non-equilibrium between the superheated liquid and the saturated vapor within the two-phase flow part; the sound speed has been chosen as the critical flow criterion. - heat exchanger model also usable for evaporators and condensers; a discretization of the exchanger is needed; the number of elements can be dramatically reduced as soon as the locations of flow changes are approximately known; temperature evolution can be linear or logarithmic. Validation work has to be performed for each of the components before running simulations for heat pump cycles. These components were partly implemented in SPARK, Simulation Program Analysis Research Kernel, a simulation environment developed at Lawrence Berkeley Laboratory. They will also be part of the model library of CLIM2000. (author).}
place = {France}
year = {1992}
month = {Dec}
}